Something for your mind
These were translated, so don't spank me 2 hard!
Easy ones:
#1:Imagine there's 100 businessmen. 80 of them have mobiles, 70 - pagers and 60 - tamagochies 
How many of them definetly have all three things?
#2:Imagine: There's an abyss with small bridge over it. It's night. Four men on one side of the bridge need to get to the other side. One of them crosses it in 1 min, second - 2 min, third - 5 min, last one - in 10 min. They have lantern and can cross the bridge only in two or less, and one of them had to carry lantern. Also if two of them crosses it, they walk with the speed of the slowest. I.e. if first and last cross it they'll get to the other side in 10 min.
In what minimal time they all get to the other side? 
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